Overall Thread Thread+Neck Shank Shank Size of Length of
length length length length dia. square square

L ℓ ℓn ℓs Ds K ℓk


(for blind hole)
Spiral Fluted Taps Spiral Fluted Taps Spiral Pointed Taps
SP
Spiral Fluted Taps
Specification


(for through hole)
E
1 1/8U ~
Recommended Tapping Speed depending on Materials


(for through hole)
Medium carbon steels

5 10〜

For icon explanation, refer to P.50


Hand Taps
TYPE:1 TYPE:2


Carbide Taps
Cemented
TYPE:3 TYPE:4


Roll Taps
Simple Inspection Tools Pipe Taps
Segment:1C
L ℓ ℓn ℓs Ds K ℓk No. of
Size Class Code Chamfer Type
(inch) (inch) (inch) (inch) (inch) (inch) (inch) flutes
For Unified Threads
GH1 SSUN2E1NEB
No.2-56UNC 2.5P 1.772 0.314 - 1.161 0.141 0.11 0.187 2 1
GH2 SSUN2E2NEB
GH1 SSUN2D1NEB
Thread Mills
No.2-64UNF 2.5P 1.772 0.314 - 1.161 0.141 0.11 0.187 2 1
GH2 SSUN2D2NEB
GH1 SSUN3F1NEB
No.3-48UNC 2.5P 2.205 0.354 0.669 1.28 0.141 0.11 0.187 2 2
GH2 SSUN3F2NEB
GH1 SSUN3E1NEB
No.3-56UNF 2.5P 2.205 0.354 0.669 1.28 0.141 0.11 0.187 2 2
Dies

GH2 SSUN3E2NEB
GH1 SSUN4H1NEB
No.4-40UNC 2.5P 2.205 0.354 0.709 1.28 0.141 0.11 0.187 2 2
GH2 SSUN4H2NEB
GH1 SSUN4F1NEB
No.4-48UNF 2.5P 2.205 0.354 0.709 1.28 0.141 0.11 0.187 2 2
Center Drills


GH2 SSUN4F2NEB
GH1 SSUN5H1NEB
No.5-40UNC 2.5P 2.205 0.433 0.768 1.358 0.141 0.11 0.187 2 2
GH2 SSUN5H2NEB
GH1 SSUN5G1NEB
No.5-44UNF 2.5P 2.205 0.433 0.768 1.358 0.141 0.11 0.187 2 2
GH2 SSUN5G2NEB
Centering Tools


GH1 SSUN6J1NEB
No.6-32UNC GH2 SSUN6J2NEB 2.5P 2.205 0.433 0.768 1.358 0.141 0.11 0.187 3 2
GH3 SSUN6J3NEB
ANSI
SP-2
189